shell allows native code to be "saved" to collection and then throws Unexpected identifier when retrieved

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    • Type: Bug
    • Resolution: Done
    • Priority: Major - P3
    • None
    • Affects Version/s: 2.4.3
    • Component/s: Shell
    • None
    • Environment:
      amazon ami linux (~ CentOS 6), and also os x 10.8.3
    • Fully Compatible
    • ALL
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      ~> mongo
MongoDB shell version: 2.4.3
connecting to: test
> db.blah.count()  // new empty table
0

// native and non-native functions 
> var native = "".trim
function trim() { [native code] }
> var nonNative = function() {print('hi')}
function () {print('hi')}
> 
> // everything is cool for the nonNative function
> db.blah.insert({f:nonNative})
> db.blah.find()[0]
{
	"_id" : ObjectId("517967ac68f5d75f0efedc26"),
	"f" : function () {print('hi')}
}
> 

// lets try and trick it with a native function (it saves fine, bombs on retrieval)
// note: src/mongo/shell/types.js:L592 thrown below is a "for (var k in obj)" construct.  the native function property bombs this, it is not the source of the error
> db.blah.insert({f:native})
> db.blah.find()[1]
Thu Apr 25 17:28:54.386 JavaScript execution failed: SyntaxError: Unexpected identifier
Thu Apr 25 17:28:54.386 JavaScript execution failed: Error: 16722 JavaScript execution failed: SyntaxError: Unexpected identifier at src/mongo/shell/types.js:L592 

// record is there, but the property f throws an exception in the shell
> db.blah.find()[1]._id
ObjectId("517967c368f5d75f0efedc27")
> db.blah.find()[1].f
Thu Apr 25 17:29:29.342 JavaScript execution failed: SyntaxError: Unexpected identifier
Thu Apr 25 17:29:29.342 JavaScript execution failed: Error: 16722 JavaScript execution failed: SyntaxError: Unexpected identifier

// zero still works
> db.blah.find()[0]
{
	"_id" : ObjectId("517967ac68f5d75f0efedc26"),
	"f" : function () {print('hi')}
}
      Show
      ~> mongo MongoDB shell version: 2.4.3 connecting to: test > db.blah.count() // new empty table 0 // native and non- native functions > var native = "".trim function trim() { [ native code] } > var nonNative = function() {print( 'hi' )} function () {print( 'hi' )} > > // everything is cool for the nonNative function > db.blah.insert({f:nonNative}) > db.blah.find()[0] { "_id" : ObjectId( "517967ac68f5d75f0efedc26" ), "f" : function () {print( 'hi' )} } > // lets try and trick it with a native function (it saves fine, bombs on retrieval) // note: src/mongo/shell/types.js:L592 thrown below is a " for ( var k in obj)" construct. the native function property bombs this , it is not the source of the error > db.blah.insert({f: native }) > db.blah.find()[1] Thu Apr 25 17:28:54.386 JavaScript execution failed: SyntaxError: Unexpected identifier Thu Apr 25 17:28:54.386 JavaScript execution failed: Error: 16722 JavaScript execution failed: SyntaxError: Unexpected identifier at src/mongo/shell/types.js:L592 // record is there, but the property f throws an exception in the shell > db.blah.find()[1]._id ObjectId( "517967c368f5d75f0efedc27" ) > db.blah.find()[1].f Thu Apr 25 17:29:29.342 JavaScript execution failed: SyntaxError: Unexpected identifier Thu Apr 25 17:29:29.342 JavaScript execution failed: Error: 16722 JavaScript execution failed: SyntaxError: Unexpected identifier // zero still works > db.blah.find()[0] { "_id" : ObjectId( "517967ac68f5d75f0efedc26" ), "f" : function () {print( 'hi' )} }
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      there is a bson "Code" type allowing us to save functions in a collection.

      From the shell, if a native function [like String.prototype.trim used below] is saved to the database, it will throw an Unexpected identifier when retrieved.

      I have not been able to identify the exact source of the error. In the nodejs driver -- and i assume other drivers -- it works fine in the sense that it will not throw an error. Obviously the property still has invalid data.

            Assignee:
            DO NOT USE - Backlog - Platform Team
            Reporter:
            Henry Hicks
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              Created:
              Updated:
              Resolved: